/*
 * Copyright 2010-2012 Susanta Tewari. <freecode4susant@users.sourceforge.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package javautil.file;

import java.io.File;

/**
 *
 * @author Susanta Tewari <statsusant@yahoo.com>
 */
public class FileUtil {

    public static void main(String[] args) {
        System.out.println("Renamed: " + rename(new File("c:/temp2.txt"), "temp3.txt"));
    }

    /*
     * Get the extension of a file.
     */
    public static String getExtension(File f) {

        String ext = null;
        String s   = f.getName();
        int i      = s.lastIndexOf('.');

        if ((i > 0) && (i < s.length() - 1)) {
            ext = s.substring(i + 1).toLowerCase();
        }

        return ext;
    }

    /**
     * for a filename : myfile.mp3 returns myfile
     * @param f
     * @return
     */
    public static String getFileNameWithoutExtension(File f) {

        String ext = null;
        String s   = f.getName();
        int i      = s.lastIndexOf('.');

        if ((i > 0) && (i <= s.length() - 1)) {
            ext = s.substring(0, i);
        }

        return ext;
    }

    /**
     *
     * @param file the file to be renamed
     * @param newName NOT PATH. example: newName.txt
     * @return if succeeded
     */
    private static boolean rename(File file, String newName) {

        if (!file.exists()) {

            System.out.println("File: " + file.getAbsolutePath()
                               + "does not exist: can not be renamed");

            return false;
        }

        File newFile = new File(file.getParent(), newName);

        return file.renameTo(newFile);
    }
}
